The thing is, everyone understands this story, so hyperinflations happen only when governments are very weak — usually during or just after disastrous wars or revolutions. That’s not the situation in America now; in fact, investors are practically begging the government to take their money, with real interest rates on federal debt significantly below zero.
Still, the U.S. government does cover some of its bills by issuing new currency — a process known by the old-fashioned term “seigniorage,” derived from the ancient tradition in which monarchs charged a fee for minting gold or silver into coins. So how big a deal is seigniorage in modern America?
That’s actually a slightly trickier question to answer than you might think. When people talk about the money supply, they’re usually referring to a measure that includes bank deposits, which aren’t created by the government. Historically, we used to measure seigniorage by the annual increase in the monetary base — currency in the hands of the public, plus the reserves banks were required to hold. Since the 2008 financial crisis, however, banks have been voluntarily holding vast excess reserves, apparently because they don’t see enough good lending opportunities — and the Fed has been paying interest on these reserves, which makes them more like government debt than money the private sector was forced to accept.
My take is that it’s best to focus just on currency — pieces of green paper bearing pictures of dead presidents — which made up 98 percent of the monetary base before the crisis. So how much new currency has the U.S. government been putting into circulation? Over the course of 2021, the answer is about $150 billion — actually down from the last year of the Trump administration: